The weak interlayer, as a problematic geological body during tunnel construction, greatly influences the propagation of blasting stress wave, excavation qualities, and explosion efficiency. A series numerical models were established to study changes in process waves failure morphology surrounding rock mass, aiming reveal interlayer’s influence mechanism. result indicates that existence reduces ...

The initiation, propagation, coalescence and failure mode of brittle jointed rock mass influenced by fissure water pressure have always been studied as a hot issue in the society of rock mechanics and engineering. In order to analyze the damage evolution process of jointed rock mass under fracture water pressure, a novel numerical model on the basis of secondary development in fast Lagrangian a...

Abstract Rock anchors are used to stabilise large scale infrastructures. Failure of rock could threaten the stability and lead severe economic social consequences. The design is based on four principal failure modes, which breakage steel tendon, tendon-grout interface failure, grout-rock mass around anchor. current dimensioning methods uncertain due limited knowledge bond strength failure. meth...

Geophysical methods for local rock burst prediction are currently being developed along two lines: improving recording equipment and data processing methods. Progress in developing is constrained by the lack of informative prognostic models that describe condition mass, process mass fracturing, phenomena can substantiate choice both criteria test parameters give an estimate time remaining until...

Evaluation of blasting-induced rock damage and fragmentation is very important for safety control construction in the jointed mass. The discontinuous numerical models are commonly applied due to advantages modeling treating discontinuities. In this paper, fracturing algorithm rate dependent strength law incorporated into deformation analysis (DDA) study wave propagation phenomena dynamic proble...